package com.lk;

import com.lk.mapper.UserMapper;
import com.lk.pojo.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class MybatisDemo {
    public static void main(String[] args) throws IOException {
        //加载mybatis的核心配置文件，获取SqlSessionFactory
        String resource = "mybatis-config.xml";
        InputStream inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

        //2.获取SqlSession对象，用它来执行sql语句
        SqlSession sqlSession = sqlSessionFactory.openSession();

//        //3.执行sql
//        List<User> users = sqlSession.selectList("test.selectAll");

        //使用mapper代理方式
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        List<User> users = mapper.selectAll();

        System.out.println(users);

        //4.释放资源
        sqlSession.close();

    }
}
